James nicholson



@uiten tstrs @strut @fitta` JAMES ,NICHOLSON, OF PHILADELPHIA, PENNSYLVANIA.

Leners 11mm: No. 64,246, ma Alp-fz so, 18o?.

IiiflPROVI-Zl) APPARATUS I'OR MANUIAGTURING LAP-WELED .'I'UBES.

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yTO ALL WHOM IT MAY CONCEB-N:

Be it'known that I, JsMES NICHOLSON, of the city and county of Philadelphia, and State of Pennsylvania, have invented an improved Application of Machinery for the Manufacture of Lap-Welded BoilerFlucs, andother ilues,tubes, and pipes, wherebyneurly twice the number of lines, tubes, and pipes can be made from the same furnace and welding rolls with the same quantity of fuel as now used; and I do hereby declare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawing, and to the lettersV of reference 'marked thereon.

My invention'consists in forming two or more welding grooves, d d', on the surfaces of a set of Welding rolls, A A', forlapqvelding wrought iron and other ilues, tubes, and pipes, and in employing` two or more gangs or trains of carrying rollers, a a, 6,etc., for conveying thc lines, etc., from the Welding rolls. The openings or holes in front of the furnace, for 'passing the tubes or lues from the furnace to the Welding rolls, can be increased to the number of grooves on therolls, else a longitudinal opening extending the length of the rolls can be substituted for them. On referenceto the accompanying drawing, forming a part of this 'speciiicaticn-- Figure 1 is a plan view, showing the lap-Welded rolls AA placed one above the other, having on theirsurfaces grooves, zZ d', etc., (only twofof which are shown of various sizes, according to the sizes of the tubes to be lap-welded, the heating furnace, C, 'the gangs or trains of carrying rollers a a, 6 b, etc., andthe stopping levers D D.

Figure 2 is a side view of the same.

Figure 3 is a front view of the, heating furnace C, showing the openings or holes, e c', through which the heated lues, ete., are passed from `the furnace to the lap-Welding rolls; and

Figure is an enlarged viewV of the lap-weldingrolls A A', showing the grooves d d'.

Similar letters refer to similar parts in the several views.

In the manufacture of lap-welded fines, tubes, and pipes, they are first bent to the required size for iap Welding, and then put into a furnace adjacent to the welding rolls, only one flue or tube being in the furnace at a time. After heating' itis shoved by the Welder through the hole in the front of the furnace into the groove in the rolls and Welded. As it leaves the rolls it takes over a rod on the carrying rollers, the end of which nearest to the rolls being ball-shaped, and corresponding exactly with the internal diameter of the ilue or tube. The other end of said rod buts against a stopper lever, which prevents it from moving while the iue or tube is passing over it. After it has traversed its length, the rod is withdrawn from the flue through an opening formed inl the stop-lever frame on to other rollers. Y

It has been found by experience that a furnace cannot be Worked to its capacity with a set of lap-welding rolls having but one Welding groove. 'Y It is inexpedient and dangerous to heat more than one line at a time. The instant a flue acquires a weldin'gheat it must be passed through the rolls, else it Will burn. If tivo are heating at once, one is certain to burn While the other is being-welded. Single groove rolls entail a vast expenditure of fuel, labor, and time, as each set requires a separate furnace, with' the Wear and tear.

To use the heat generated in a tube furnace, above what is required for heating al single flue or tube, I heat two or more iiues or tubes in the same furnace and at the same timev To weld them at the proper time, and

thereby prevent them from burning, I form two or more lap-Welding grooves, d oZ, on the surfaces of a set of welding rolls,`A A. To convey the ilues or tubes from the rolls when Welded with sufficient rapidity, I use tivo or more gangs or trains vof carrying rollers, a a, Zi b, etc. To accommodate the increased number of grooves on the rolls A A and the gangs. of carrying rollers, thevnumber of holes, e c', in the front of the furnace through which the fines or tubes are passed to the rolls should be increased 'to the number of grooves on the rolls, or a horizontal slot may be substituted for them. As it takes longer to bring large lues or' tubes to a welding heat than small ones, the grooves ou the rolls can be so varied in'size that both large and small tubes can be heated in the same furnace at the same time. The small ones being first heat-ed are shoved through the rolls without delaying for the large ones. l

It will lie-seen that by the improvements herein described, the excess of heat generated in a welding furnace and heretofore lost is new profitably used, and the manufacture of lap-welded ilues, tubes, or pipes ecor nmized by the increased number made with the same furnace and rolls.

What I claim as my invention, and desire to secure by Letters Pri-tent, is In combination, a furnace with one or more openings in its front, which will admit of the simultaneous discharge of two or more heated plates or skelps, with a. set of rolls having two o1' more welding grooves, and-two or more carrying rollers, al1 substantially :ts herein described.

In testimony whereof I hereunto sign my name to this specification in presence of two subscribing witnesses. JAMES NICHOLSON.

Witnesses:

FRANK GARDE, FRANCIS D. PAsTonIUs., N 

